Code review comment for ~mwhudson/curtin:lp-1893818

> But in groovy+, the udev rule from multipath-tools that has
> always attempted to remove the devices nodes for the partitions
> of a disk that is a multipath member actually succeeds, and

Won't this break curtin on older multipaths that don't have this rule?

Or will this work with older multipath output since we're only referring to
the mpath dev (rather than a path of the mpath device)?

Some comments inline.